/Engine/Plugins/Runtime/CommonUI/Source/CommonInput/Public/CommonInputSubsystem.h
Gets the delegate that allows external systems to override which input methods are supported on this current platform.
Note : Calling order is not guaranteed. Also, keep in mind that you might need to honor the previous callee's request to not support the input type being tested.
static [FPlatformInputSupportOverrideDelegate](API\Plugins\CommonInput\FPlatformInputSupportOverrideDel-) & GetOnPlatformInputSupportOverride()